CVE-2021-31209: Microsoft Exchange Server

Medium severity, CVSS 6.5. EPSS: 2.6% chance of exploitation in the next 30 days.

Microsoft Exchange Server Spoofing Vulnerability

Affected products

• Microsoft Exchange Server: version 2013 only; version 2016 only; version 2019 only

Published 2021-05-11. Last modified 2026-06-17.